MCCIRM Freescale Semiconductor / Motorola, MCCIRM Datasheet - Page 80

• Manufacturer Part Number: MCCIRM
• Description: MCCIRM Multi-Channel Communications Interface Reference Manual
• Manufacturer: Freescale Semiconductor / Motorola

SCI Submodule
Reference Manual
80
Figure 5-5
Note that the high level sensed at RT3 causes the internal noise flag to
be set. Even though this figure shows improper alignment of the
perceived bit-time boundaries to the actual bit-time boundaries, the logic
sense samples taken at RT8, RT9, and RT10 fall well within the correct
actual bit time. The start bit and all other bits in the frame should be
received correctly.
Figure 5-6
beginning of a start bit. Note that RT5 is sensed as logic 1, setting the
internal noise flag. This figure also illustrates a worst-case alignment of
the perceived bit-time boundaries to the actual bit-time boundaries;
however, RT8, RT9, and RT10 all fall within the correct actual bit time.
The start bit is detected and the incoming data stream is correctly
sensed.
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Freescale Semiconductor, Inc.
RESTART RT CLOCK
RESTART RT CLOCK
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For More Information On This Product,
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shows that noise is perceived as the beginning of a start bit.
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shows how a large burst of noise is perceived as the
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Figure 5-5. Start Search Example 3
Figure 5-6. Start Search Example 4
SCI Submodule
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PERCEIVED START BIT
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PERCEIVED START BIT
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Multichannel Communication Interface — Rev. 1.0
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ACTUAL START BIT
ACTUAL START BIT
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MOTOROLA
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LSB
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